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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Changing of line format and undo
Date: Thu, 22 Jun 2006 06:24:19 +0300
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> Date: Wed, 21 Jun 2006 14:54:07 -0700 (PDT)
> From: "Stuart D. Herring" <herring@lanl.gov>
> Cc: emacs-devel@gnu.org
> 
> > BTW should not changes of this kind also set the buffer to modified?
> 
> If and only if they should be undoable

??? Why?

> It would be very odd to have a buffer unmodified before and after
> an undo, or to be marked modified with no way (via undo) to remove
> that marking.

It is very easy to ``undo'' the buffer-modified flag: type "M-~".